Using a 12 oz karate gi for judo?

Okay let me get this out of the way, I understand that the two gi do different things and that the judo gi is designed for the stresses put on them and most karate gi will tear but the 12oz is pretty thick.
The reason I ask is that I will be taking a judo class in college at some point for my p.e. credit and I'm cheap... oh and out of work lol, but I have my karate gi It's a century 12oz heavy weight.
So if anyone has any experience with this or just basic advise from the judoka and jujutsuka I would be greatly appreciative.

I often use my brushed cotton Tozando karate dogi for aikido class, which is no problem, and occasionally for judo and jujitsu. I like it in the summer because it is much lighter than my heavy ass single and double weaves. I went through a stage where I bought way too heavy judo uwagi and now I regret it. I can't wait for them to wear out so I can get a lighter single weave, but the damn things don't wear out! There are some lightweight single weaves, like Seersuckers, but I don't know how durable they are as I've owned the same judo style uwagi tops for years. Actually, my favorite judo to is a cheaper basic Century...its my least expensive one, but its nice and light and the collar doesn't choke me out just by standing there.

Back to wearing a karate dogi in judo, I recently did this and thought I heard a seem tear while working with my partner. Turned out is was just his fingernails scraping on the brushed cotton of my top but it still made me really nervous and scared I was going to get a seem tear. Once those tears start they just get worse. Ever since then, the one or two times I've worn my karate uniform to judo I've been really self-concious about it and its effected my training to the point where I do, or don't do, thing I normally would out of fear of getting a tear.

Also, the ties hanging off a karate uniform bother me a little when rolling or doing judo tachiwaza.

There's a karate guy at my local club who trained for several months with his karate gi, before he bought a Judo one. His gi wasn't like any other karate gi I've seen though it was made out of a very tough, almost canvas, type material and could take quite the battering.

So if you have something like that it might survive. If not then, well don't complain if your gi ends up getting ripped.

There's a karate guy at my local club who trained for several months with his karate gi, before he bought a Judo one. His gi wasn't like any other karate gi I've seen though it was made out of a very tough, almost canvas, type material and could take quite the battering.

So if you have something like that it might survive. If not then, well don't complain if your gi ends up getting ripped.

There's a karate guy at my local club who trained for several months with his karate gi, before he bought a Judo one. His gi wasn't like any other karate gi I've seen though it was made out of a very tough, almost canvas, type material and could take quite the battering.

So if you have something like that it might survive. If not then, well don't complain if your gi ends up getting ripped.

I used to have one like that that I picked up at an expo somewhere, damn thing could practically stand up on its own without me in it.

It survived several years of hard randori in various styles, but as you said, its not like any karate gi (or even Judo gi) I've seen since.